Centrifugal machine.



UNITED STATES PATENT OFFICE.

WILLIAM E. ANDREE, OF CHICAGO,- ILLINoIs, ASSIGNOR TO NELSON a KREUTEnooMrANr, A' @ORPORA-TION or ILLINOIS.

CE NTRIFUGAL :MACHINE.

Specification of Letters Patent.

ratented. March 27, 1906.

Application filed Saptember 18, 1905. Serial No. 278.952-

T all whom it may concern;-

Be it known that I, WILLIAM E. ANDRnE, a citizen of the United States, 'anda resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Centrifugal Driers, of which the following is a specification, and which are illustrated in the accompanying drawings,

( forming a part thereof.

This invention relates to driers for use in laundry-work for expressingthe water from garments after washing. Its object is to provide' for the direct application of a motorto the rotating member of the machine; and it consists in a suitable standard, a erforated' receptacle mounted on a rotatab e vertical spindle, and an electric motor carried in part by the spindle and in part bythe standard", and in various details of construction, as

hereinafter pointedcout.

' The invention is. illustrated in .the accom panying drawings, in which- Figure 1 1s averti'cal central section of the machine, partly in elevation; and Fi detail of a' modification of one of the 5c of the machine. Y

The machine is shown from, which rise standards 11, carrying an atures annular casing -12, within which is locatedthereceptacle'l3 for the articles'to be dried,

- this receptacle having perforated walls 14 and in a sleeve 16, carried by t e base. "ably a ball 17-is inter osed between the end being carried by a verticals indie-1 5, step ed Pre erofthe spindle 15 and t e bottom of the sleeve 16, one of these parts, as shown the end of the a-radial flange 18 intermediate of. its ends 4 preferably of rubber 19 20, located one on spindle, bein center the'ba Thesleeve is provided with and is inclosed by -a pair of elastic rings,

each side of the flange 18, one of the rings, as 19, filling the space between the flange and the bottom of the casing 21, within which the sleeve 16 is inclosed, and the other ring 20 being forced against the flange 18 by an annular follower 22, screwed into the casing 21. The central aperture of this follower is sufiiciently large to allow of lateral play of the sleeve 16..

The motor-armature23 is fixed upon the spindle 15 and its field 24 is supporte by the s eeve 16, the lower end of its casing being in threaded engagement therewith, as shown 2isaj as havinga base 10,

slightly concave in order to at 25. The upper end of the field-casing is rovided with a bushing or box 26 having a hearing upon the spindle 15, this box extending upwardly and'flaring to form a greasecup 27. The lower end of the field-casing 24 is connected to the base 10 in order to prevent its rotation. This connection is shown in Fig. 1 as being accomplished by means of a plurality of U-shaped spring members 28,

secured to the base by means of screws 29, which secure the casing 21 in placeand secure it ,to the field-casing by the bolts 30. 1

A grease-cup'Bl is formed on the u per face of the armature 23 to receive the rippings from the box 26. A switch is conventionally shown at. 32, and leaders 33 convey the current thereform to the field of the dynamo. p

- The lower'end of the casing 12 is provided with an instanding and upwardly-curved stand to provide a trough 34 to receivethe water expressed from the articles in the receptacle 13, and a drain-pipe 35 is provided for em tying this trough.

here 1s shownin the drawings an electric motor of the induction type; but any form of motor may beusedand the electrical con nections will be made in the manner well-,

known to those skilled in the art. 'In lieu of the flexible connections 28 between thefieldcasing and the base there ma be used for preventing the rotation of the eld-caslng 24 of the motor studs" 36, projecting'dowhwardly from the casin and entermg apertures 37 in the base, as s own in- Fig. 2, it being important that such "apertures'be of greater radial dimension wit I reference to the base than the diameter of the studs...

In machines of this class a speed is developed which renders it impracticable to use stationary journals for the shaft or s indie,. and for this reason the problem of app ying a I motor directly to the spindle has been a diffimaybe driven in either direction by merely. changing the electrical connections, and the ielding' or loose connections between the sleeve. The screw-thread'at 25 will be so connected that 'the reaction on the casing due to the rotation of the armature will tend to turn the casing down.

In order to economize time, it is necessary to use some form of brake mechanism to stop the machine when the expressing operation is completed. In this machine this is accomplished by a reversal of the current, and hence the direction of the reaction upon the motor-casing is reversed and tends to turn it back on the thread at 25. This tendency is resisted by the direct connection between the dynamo-casing and the base, while this connection does not prevent the lateral movementincident to the automatic centering of the machine.

A centrifugal machine in which the motor is carried directly by the spindle or mounted material introduced into the receptacle is.

ordinarily much less in weight than the motor and all lateral strain, as by the-application of a driving-belt to a pulley on the spindle, is avoided.

The machine here shown and described field and thebase of the machine are important not only for the purpose of permitting the use of a reverse current for brake purposes, but also as adapting the machine to be.

operated in either direction.

I claim as my invention 1.- A centrifugal machine comprising, in

combination, a base. an elastic cushion seated on the base, a journal-box resting on the cushion, a spindle step ed in thebox, a motor having its rotatab e'element' secured to the spindle and its fixed element secured to the journal-box, and a receptacle carried by the spindle.

2. A centrifugal machine comprising, in combination, .a base, an annular elastic cushion seated on the base, a journal-box having aflan e resting on the cushion, a spindle journa ed in the box, a motor havin its rotatable element secured to the spind e and its fixed element secured to the journal box, and a receptacle carried by the spindle.

3. A centrifugal machine comprising, in combinat on, a base, a journal-box mounted in the base, springs supporting the box against lateral oscillation, a spindle stepped in the box an electric motor havin its armature fixed to the spindle and its fie d fixed to the box, and a receptacle carried bv the spindle.

4; A centrifugal machine comprising, in combination, a base having a well, a journalbox located in the well and having a radial flange, elastic" cushions within the well and engaging opposite faces of the flange, a follower adjus'tably mounted in the well and bearing the cushions to the bottom thereof, a spindle stepped in the box; an electric motor having its armature and field fixed, one upon the spindle and the other upon the box, and a receptacle carried by the spindle.

5. A centrifugal machine comprising, in combination, a base, a journal-box mounted in the base, springs supporting the box against lateral oscillation, an electric motor having itsarmature fixed to the spindle and its field fixed to the box, stops engaging the field with the base to prevent the rotation oft the former, and a receptacle carried by the spindle. e

6. The combination-with a frame comprising abase, a standard rising from the base and an annular casing carried by the standard, of a journal-boxmounted in the base, a spring reacting between the base and the journal-box, a spindle stepped in the box and extending into thecasing of the frame, a motor having its rotatable element secured to the spindle and its fixed element secured to the box, and a receptacle mounted onthe spindle within the annular frame-casing.

. WILLIAM' E.-ANDREE. Witnesses Louis K. GILLSON, CHARLES B. GILLs X. 

